cad a22 4500 569274478 20200514044055.0 cr unu---uuuuu 190725e201907 xx s 000 0 eng 10.5167/uzh-171606 doi 10.1111/clr.13451 doi (ZORA)oai:www.zora.uzh.ch:171606 610 ddc 31038788 pmid Tissue integration of zirconia and titanium implants with and without buccal dehiscence defects-A histologic and radiographic preclinical study [Elektronische Daten] [Daniel S Thoma, Hyun-Chang Lim, Kyeong-Won Paeng, Ui-Won Jung, Christoph H F Hämmerle, Ronald E Jung] openAccess eu-repo OBJECTIVE To histologically and radiographically evaluate soft (primary outcome) and hard tissue integration of two-piece titanium and zirconia dental implants with/without buccal dehiscence defects. MATERIALS & METHODS In six dogs, five implants were randomly placed on both sides of the mandible: (a) Z1: a zirconia implant (modified surface) within the bony housing, (b) Z2: a zirconia implant (standard surface) within the bony housing, (c) T: a titanium implant within the bony housing, (d) Z1_D: a Z1 implant placed with a buccal bone dehiscence (3mm in height, identical width to implant body), and (e) T_D: a titanium implant placed with a buccal bone dehiscence. Two weeks of healing and 6months of loading were applied on each hemi-mandible, respectively. RESULTS The median level of the margo mucosae shifted more apically over time in all groups (borderline statistical significance in groups Z1_D: -0.52mm and T_D: -1.26mm). The median height of the peri-implant mucosa in groups Z1_D and T_D was greatest at 2weeks and 6months, but the linear change in the peri-implant mucosa was statistically significant only for group T_D over time (-1.45mm). Z1 demonstrated a higher bone-to-implant contact compared to Z2 and T. Minimal change of radiographic marginal bone levels in all groups was observed (<1mm). CONCLUSION When buccal dehiscence was presented, titanium implants presented significant loss of peri-implant mucosal height compared to zirconia implants with a modified surface, due to greater apical shift of the margo mucosae. A modified zirconia surface enhanced osseointegration. Clinic of Reconstructive Dentistry zora Thoma Daniel S. joint author Lim Hyun-Chang joint author Paeng Kyeong-Won joint author Jung Ui-Won joint author Hämmerle Christoph H F. joint author Jung Ronald E. joint author Clinical Oral Implants Research 30(7):660-669 https://www.zora.uzh.ch/id/eprint/171606/1/Thoma_et_al-2019-Clinical_Oral_Implants_Research_acc.pdf text/html WWW-Backlink auf das Repository 1 Journal Article PeerReviewed zora ZORA 856 40 https://www.zora.uzh.ch/id/eprint/171606/1/Thoma_et_al-2019-Clinical_Oral_Implants_Research_acc.pdf text/html WWW-Backlink auf das Repository ZORA 700 1- Thoma Daniel S. joint author ZORA 700 1- Lim Hyun-Chang joint author ZORA 700 1- Paeng Kyeong-Won joint author ZORA 700 1- Jung Ui-Won joint author ZORA 700 1- Hämmerle Christoph H F. joint author ZORA 700 1- Jung Ronald E. joint author ZORA 773 0- Clinical Oral Implants Research 30(7):660-669 BK010053 XK010053 XK010000 ZORA ZORA ZORA Journal Article openAccess